Remove relationship from group to products
Merge branch 'master' into mongodb/PIM-1686
PIM-1686 Try to load products from group without links
Merge branch 'master' into mongodb/PIM-1686
Merge branch 'master' into mongodb/PIM-1686
PIM-1686 Manage references to products from groups
Generate a lazy load persistent collection to get products
Merge branch 'master' into mongodb/PIM-1686
Merge branch 'master' into mongodb/PIM-1686
PIM-1711 : add ProductRepositoryInterface to prepare Mongo impl
PIM-1771 : add FlexibleEntityRepositoryInterface
PIM-1771 : change visibility of getFlexibleQueryBuilder to protected
PIM-1711 : remove useless findAttributeByCode method
PIM-1711 : change visibility of findByWithAttributesQB to protected
PIM-1711 : remove useless findWithAttributes method
PIM-1771 : re-order methods
PIM-1711 : change visibility of getCodeToAttributes to protected, remove
it from FlexibleEntityRepositoryInterface
PIM-1771 : change visibility of applySorterByAttribute and begin to refactor the
implementation of FlexibleSorter
PIM-1771 : change visibility of applyFilterByAttribute to protected and begin to
refactor the implementation of FlexibleFilter
PIM-1771 : remove deprecated use statement